4UM8

Crystal structure of alpha V beta 6

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.852 Å
  • R-Value Free: 0.281 
  • R-Value Work: 0.238 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history. 

Literature

Structural Determinants of Integrin Beta-Subunit Specificity for Latent Tgf-Beta

Dong, X., Hudson, N.E., Lu, C., Springer, T.A.

(2014) Nat.Struct.Mol.Biol. 21: 1091

  • DOI: 10.1038/nsmb.2905
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    • Eight integrin α-β heterodimers recognize ligands with an Arg-Gly-Asp (RGD) motif. However, the structural mechanism by which integrins differentiate among extracellular proteins with RGD motifs is not understood. Here, crystal structures, mutations ...

    Eight integrin α-β heterodimers recognize ligands with an Arg-Gly-Asp (RGD) motif. However, the structural mechanism by which integrins differentiate among extracellular proteins with RGD motifs is not understood. Here, crystal structures, mutations and peptide-affinity measurements show that αVβ6 binds with high affinity to a RGDLXXL/I motif within the prodomains of TGF-β1 and TGF-β3. The LXXL/I motif forms an amphipathic α-helix that binds in a hydrophobic pocket in the β6 subunit. Elucidation of the basis for ligand binding specificity by the integrin β subunit reveals contributions by three different βI-domain loops, which we designate specificity-determining loops (SDLs) 1, 2 and 3. Variation in a pair of single key residues in SDL1 and SDL3 correlates with the variation of the entire β subunit in integrin evolution, thus suggesting a paradigmatic role in overall β-subunit function.

    Organizational Affiliation: 

    1] Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA. [2] Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, Massachusetts, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
INTEGRIN ALPHA-V
A, C
681Homo sapiensMutation(s): 1 
Gene Names: ITGAV (MSK8, VNRA, VTNR)
Find proteins for P06756 (Homo sapiens)
Go to Gene View: ITGAV
Go to UniProtKB:  P06756
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
INTEGRIN BETA-6
B, D
788Homo sapiensMutation(s): 1 
Gene Names: ITGB6
Find proteins for P18564 (Homo sapiens)
Go to Gene View: ITGB6
Go to UniProtKB:  P18564
Small Molecules
Ligands 9 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4
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A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
CL
Query on CL
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A, C
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
CA
Query on CA
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A, B, C, D
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
MAN
Query on MAN
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A, C, D
ALPHA-D-MANNOSE
C6 H12 O6
WQZGKKKJIJFFOK-PQMKYFCFSA-N
 Ligand Interaction
BMA
Query on BMA
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A, C, D
BETA-D-MANNOSE
C6 H12 O6
WQZGKKKJIJFFOK-RWOPYEJCSA-N
 Ligand Interaction
MG
Query on MG
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B, D
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
CAC
Query on CAC
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B, D
CACODYLATE ION
dimethylarsinate
C2 H6 As O2
OGGXGZAMXPVRFZ-UHFFFAOYSA-M
 Ligand Interaction
NAG
Query on NAG
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Download CCD File 
A, B, C, D
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
NI
Query on NI
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A
NICKEL (II) ION
Ni
VEQPNABPJHWNSG-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.852 Å
  • R-Value Free: 0.281 
  • R-Value Work: 0.238 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 184.450α = 90.00
b = 170.010β = 98.68
c = 102.390γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
XDSdata scaling
XDSdata reduction
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots


View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-11-12
    Type: Initial release
  • Version 1.1: 2014-11-19
    Type: Database references
  • Version 1.2: 2014-12-17
    Type: Database references